運(yùn)行結(jié)果：2550

#include <stdio.h>

int main()

{

int sum=0;

int i;

for(i=1;i<101;i++)

if(i%2==0)

sum+=i;

printf("sum=%d",sum);

return 0;

}

#include?<stdio.h>
int?sum(int?n)????//從第100開始執(zhí)行
{
????if?(n==0)????//如果n已經(jīng)到0就返回0
????{
????????return?0;
????}
????else
????{
????????return?sum(n-2)+n;????//如果不等于0?就計(jì)算n-2的值?當(dāng)函數(shù)執(zhí)行完畢回到這里的時(shí)候就+n
????}
}
void?main()
{
????printf("%d?\n",sum(100));????//sum（輸入一個(gè)偶數(shù)）
}

#include <stdio.h>

int sum=0;

int main()

{int i;

? ?for(i=0;i<=100;i+=2) sum+=i;

printf("sum=%d\n",sum);

}

#include<stdio,h>

int main()

{

int sum=0;

int i;

for(i=0;i<=100;i++)

{

if(i%2==0)

{

sum+=i;

}

printf("%d\n",sum);

}

return 0;

}

#include <stdio.h>

int sum=0;

int main()

{

? ?for(i=1,i<101,i++)

? ?if(i/2==0)

sum+=i;

printf("sum=%d",sum);

}